Aside from the liquid screen protectors, pretty much all screen protectors are made by the same few factories in China - very little difference in quality. The only differences are really the finish - matte, gloss, semi gloss, etc.

Some people hate having that extra bit of plastic on their screen and feel it degrades the touch performance and/or image quality, but that's all subjective. Google for drop tests of your specific phone if you're unsure.